About time that Coinbase quashes the rumors that Ripple would be listed there and/or on GDAX.
Too many people buying into Ripple on this speculation, which has made this token very much overvalued.
Ripple's most recent price spikes have been on rumors that banks would integrate with RippleNet system in many of the Asian banks as well as the Amex announcement from 2 months ago. Coinbase rumors was also what helped the price go up as well, but now that Coinbase says they won't add Ripple, I don't see the price going up much higher that fast anymore.